Lock



Patented Au 6, 19:39.

UNITED STATES FRANK ELLISON BEST, OF SEATTLE, \VASHINGTON.

LOCK.

Application filed December 26, 1923. Serial No. 682,754.

My invention relates to improvements in locks of the form that are especially adapter for use in connection with the doors of sate deposit boxes, and receptacles like nature wherein two keys are required to unlock the lock, one key operating to release the bolt or bolts that hold the door and another key operating to move said bolts after they are released.

An object oi my invention is to provide a double lock and doorconstruction of this nature in which an integral door mace from a single piece of solid metal is suitably recessed for the reception oi the lock and latch 15 mechanism thereby making a lock and door structure of unusually strong and rigid construction that it is practically impossil is to open by the application of force.

Another object is to provide a lOCl-Z and door construction of this nature embodying two primary pin tumbler loclr mechanisms arranged to be releasably secured in a door by key operated means whereby said lock mechanisms may be readily removed for the purpose of changing the combinations of the same.

A further object is to provide a lock and door construction in which a solid section of the metal of which the door is made is left directly to the rear or" the lock cylinders thereby preventing destruction of the look by punching the lock cylinders through from the front.

Other and more specific objects will be apparent from the following description taken in connection with the accompanying drawings:

lVhile I have shown and described a pre ferred embodiment of my invention it is to be understood that said invention is capable of embodiment in many different iorms and that the form used is chosen for purposes of illustration only.

In the accompanying drawings Figure 1 in a perspective view of a door embodying lock mechanism constructed in accordance with my invention.

Figure 2 is a sectional view oi the same substantially on a broken line 22 of Fig. 3.

Fig. 3 is a sectional View substantially on a broken line 33 of Fig. 2.

Fig. 4 is aview in cross section substantially on broken line l4 of Fig. 3.

5 is a detached perspective view of a resilient locking dog embodied in the invention.

Fig. 6 is a detached perspective view of a locking bolt embodied in the invention.

Referring to the drawings, throughout which like reference numerals designate like parts, 8 designates a door, of the form commonly used on safe deposit vaults, which door is adapted to fit within a frame 9, a fragment only of which is shown in Fig. 3. The door 8 is provided at the rear end with tubular means 10 by which it may be hinged as by a pin 11, to the frame 9, and said door differs from the usual safe deposit vault door in that it is formed of a single piece of metal, preferably steel, suitably bored and recessed for the lock and latch mechanism, whereas, in the door of the usual safe deposit vault the secondary loci; mechanism is disposed within a separable housing that is secured to the inner o of the door.

The inner side of the door 8 is provided with an extension 12, Fig. 3 enlarged at the forward end as at 13, and having a tubular recess 1 lthat communicates with a larger recess of oblong cross sectional shape in the enlarged forward end 13. A bolt embodying an enlarged forward end 16 and a smaller, rearwardly extending shank 17 is operatively disposed within the recesses 14 and 15.

The bolt shank 17 has a flattened side 18 provided wit-i a transverse groove 19 for the reception of an eccentric pin 20 on a rotatable throw member 21 that is provided on the end of a pin tumbler lock 22.

The rear end of the bolt shank 17 has a rearwardly projecting, integral, member 23 affording a shoulder 2d against which the end of a resilient locking dog 25 may engage and further affording clearance space 26 for the end or" the locking dog 25 when the bolt is retracted or withdrawn.

The locking dog 25 has a downwardly bent side flange 27 extending from the forward end rearwardly throughout a portion of its length to renderthe forward end of said locking dog rigid and leave the rear end flexible. The locking dog is securely anchored within the recess 14 by wedging the rear end of the locking dog tightly between a plug 28 and the wall of the recess 14, the plug 28 being pressed or driven into the recess let. A pin tumbler lock 80, arranged to be inserted throu h the front of the door 8 is provided on its inner end with a throw member 31 having an eccentric pin 32 adapted to engage beneath the locking dog 25 to lift the same and release the bolt when the lock is operated. A downwardly bent lug 33 on the locking dog 35 forms a stop to limit the movement of the pin 32.

The locks 22 and 30 are both preferably arranged to be locked within the recesses in the door 8 within which they are housed by key operated means whereby they may be released and withdrawn by the use of a special key different from the usual key that operates the lock. The mechanism for locking said locks 22 and 30 within their respective recesses embodies in part a locking gate 34: Figs. 2 and 3 which is retracted into the lock housing 22 or caused to project outwardly from said housing by the operation of a key within the lock and is arranged to engage with a shoulder 35 formed in the part in which the lock is housed. In order to protect this locking gate from destruction by a tool as a drill cutting in from the front of the lock we provide a recess 36 in the lock housing or door in front of such locking gate and insert hardened armor means as steel balls 37 in said recess so that the armor means will deflect or stop any drill directed toward the locking gate thus making it impossible to gain access to the look by drilling away the locking gate and then removing the lock core.

In operationwhen the door is closed and locked the bolts and other parts of the locking mechanism will occupy the positions shown in Figs. 1, 2 and 3. When the door is to be unlocked the custodian of the vaults will insert his key into the lock 30 and turn the throw 31 and pin 32 to the left from the position shown in Fig. 3, thus lifting the locking dog 25 clear of the shoulder 24, whereupon the tenant having inserted his key in the other lock 22 may turn the throw 21 and pin to retract the bolt 16.

As soon as the tenant has turned his key and retracted the bolt 16, the custodian may return his lock to the locking position, withdraw his key and go away leaving the end of the locking dog resting on the top of the member 23. Then the tenant closes the door 8 and throws the bolt 16 into locked position the locking dog 25 will drop down, due to the spring-like action of the same, into the position shown in Fig. 3 the end of said locking dog locking back of the shoulder 24 and making it impossible for the tenant 'to again unlock the door until the custodian has inserted his key and moved the locking dog 25 to release the bolt.

It will be noted that the extension 12 on the back of the door 8 forms a solid integral metal wall against which the rear end of the lock cores abut, as more clearly shown in Fig. 4. This feature materially increases the security of the lock by making it practically impossible to punch the locks 22 and through the doors from the front, as is sometimes done in structures of this nature in which the latch or bolt mechanism on the rear side of the door is housed in a separable housing that is screwed or otherwise fastened to the door.

The foregoing description and accompanying drawings clearly disclose a preferred embodiment of the invention, but it will be understood that this disclosure is merely illustrative and that numerous changes in the device may be made within the scope and spirit of the following claim.

I claim:

1. In a door and lock of the class described an integral metal door having recesses parallel to the plane thereof for the reception of bolt mechanism and having transverse recesses for the reception of pin tumbler locks and having integral metal walls at the rear ends of said transverse recesses for supporting said pin tumbler locks.

2. In apparatus of the class described a metal door, an integral extension on the rear side of said door and having a longitudinal recess, said door having transverse recesses extending from the front side inwardly and intersecting said longitudinal recess, bolt mechanism in said longitudinal recess and key operated locks in said transverse recesses.

3. In a door and lock of the class described an integral metal door having a bolt receiving recess extending from the front edge inwardly, a bolt reciprocably disposed in said recess, said bolt having a shoulder on the inner end thereof, a locking dog arranged to engage with said shoulder to hold said bolt in locking position, lock receiving recesses extending inwardly from the front face of said door, a key operated lock disposed in one of said recesses and arranged to release said locking dog from engagement with said shoulder and another key operated lock disposed in another recess and arranged to move said bolt.

at. In a structure of the class described an integral metal door having a bolt receiving recess extending from the front end inwardly and having lock receiving recesses extending from the front face inwardly and intersecting said bolt receiving recess, a bolt slidable in said bolt receiving recess said bolt having a vertical groove, a shoulder on said bolt, a resilient locking dog in said bolt receiving recess arranged to abut against said shoulder to hold said bolt in protracted position, a pin tumbler lock having a throw member engaging said locking'dog for releasing the same from said bolt, and another pin tumbler lock having throw member engaging within the groove in said bolt for moving said bolt when it is released by said locking dog. 7

5. A structure of the class described, embodying, means forming a housing for a lock core, devices for locking said core in said housing, and hardened armor means for protecting said locking devices.

6. The combination With a core housing, of a lock core, means on said core for interlocking with said housing and hardened armor means interposed between said interlocking means and the face of said housing.

7. The combination with a lock core housing, of a lock core, a locking gate on the exterior or" said lock core for interlocking with said housing and armor means in said housing for preventing application of a cutting tool to said gate.

FRANK ELLISON BEST. 

